Energy is an additional resource in MTG
Mana when you need it, a kill spell when you dont
Maybe its good Im not on the Commander Format Panel, because I love cards like Triskaidekaphile, and I pack Shaman of Forgotten Ways into my green stompy decks to get that Biorhythm high
Legendary Creature - Human Samurai Color tag templates(None) Ronin Houndmaster Haste Bushido 1 (Whenever this creature blocks or becomes blocked, it gets +1/+1 until end of turn.) Creature - Human Samurai Color tag templates(None) Rune-Tail, Kitsune Ascendant When you have 30 or more life, flip Rune-Tail
If you want to be a more straightforward attacking deck, there are a lot of angels that have lifelink and powerful abilities
You can also choose when you want to activate this ability, so you can use them at the best time for you